Add documentation of flow of information for Text-to-Speech on Chrome/CROS.

NOTRY=true
[email protected]

Change-Id: I52c8cb2287f31554f5c6faab740ebd701b135eed
Reviewed-on: https://chromium-review.googlesource.com/1013693
Commit-Queue: Katie Dektar <[email protected]>
Reviewed-by: Katie Dektar <[email protected]>
Cr-Commit-Position: refs/heads/master@{#551355}
diff --git a/docs/README.md b/docs/README.md
index 975dcb5b..7aee7c0 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -280,6 +280,10 @@
     feedback (ChromeVox) on Chrome OS.
 *   [ChromeVox on Desktop Linux](accessibility/chromevox_on_desktop_linux.md) -
     Enabling spoken feedback (ChromeVox) on desktop Linux.
+*   [Offscreen, Invisible and Size](accessibility/offscreen.md) - How Chrome
+    defines offscreen, invisible and size in the accessibility tree.
+*   [Text to Speech](accessibility/tts.md) - Overview of text to speech in 
+    Chrome and Chrome OS.
 *   [BRLTTY in Chrome OS](accessibility/brltty.md) - Chrome OS integration with
     BRLTTY to support refreshable braille displays
 *   [PATTS on Chrome OS](accessibility/patts.md) - Notes on the PATTS speech